/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.yarn.service.utils;

import org.apache.hadoop.registry.client.binding.RegistryUtils;
import org.apache.hadoop.yarn.service.conf.YarnServiceConstants;


public class ServiceRegistryUtils {

  public static final String SVC_USERS = "/services/yarn/users";

  /**
   * Get the registry path for an instance under the user's home node
   * @param instanceName application instance
   * @return a path to the registry location for this application instance.
   */
  public static String registryPathForInstance(String instanceName) {
    return RegistryUtils.servicePath(
        RegistryUtils.currentUser(), YarnServiceConstants.APP_TYPE, instanceName
    );
  }

  /**
 * Build the path to a service folder
 * @param username user name
 * @param serviceName service name
 * @return the home path to the service
 */
  public static String mkServiceHomePath(String username, String serviceName) {
    return mkUserHomePath(username) + "/" + serviceName;
  }

  /**
   * Build the path to a user home folder;
   */
  public static String mkUserHomePath(String username) {
    return SVC_USERS + "/" + username;
  }
}
